Fin Tubes Mfg. Co. Manufactures Crimped Type Fin Tubes. Fin Tubes Mfg. Co. Is the supplier of finned tubes, and inside/ outside integral finned tubes. Crimped Type Fin Tubes is a non taper fin wrapped under tension around the base tube. Crimped Type Fin Tubes has the fining process which results in a crimp forming at the foot of the fin. The fin is then welded to the base tube at the strip ends. This tube has the maximum operating temperature for this fin type is 250 degree centigrade.